Dynamo-electric machine.



E. HELD. DYNAMO ELECTRIC MACHINE. APPLICATION FILED NOV. 23, 1912.

1,066,494. Patented July 8, 1913.

35 which purpose magnet-izable segm j'e'ctrof theTKing offWurtte nberg, and r'ef' j sidingat-Stl'ittgart, Gernmiy, ave invented EUGEN HELD, or st min eERMAnY.

DYNAiio-Emc'rmc memes To ll emit-in; Mi i I Be it known that I, EUQEN HEL a sub a new and useful Dynamo-Electric Machine,-

of which the followingis a. specification..-

during each revolution of'the armature, sov

This inventionrelates to a dynamoelectric nachine of novel COl'lSilIllQillOIl by means of" which a greater, number. of current maxima than heretofore may be Obtained as to moreparticula-rlyadapt the machine for the-operation of tachoineters,frequencymeters and similar instruments In the accompanying drawingLFigiirel is a diagrammatic view of a'dynamo electric machine embodying my invention; Figs. 2=8 are similar views illustrating consecutive positions of. thearmature; Fig. 9 is a diagrammat c view'of a modification of my dynamo electric machine, and Fig. 10 a similar view of a further modification;

My dyiia no electric machine Comprises essentially a pair of .opposedvslianks a, a of ajbipolar field magnet, at least one of which shanks isfurnished with a plurality of polar projections bot the. same sign, Figs. 1 to 8" showing each shank a such projections,

provided with two Intermediate the poles is rotatably mounted a double T armature 0, the web of which is provided with the necessary windings (not shown); The arran e ment is such that the magnetic conductivity between the polar projections of opposite sign is' maintained almost constant for cuts or magnetic flux conductors are provided intermediate the armature poles. For supporting these conductors, I prefer to attach to each end of armature c, a disk 0, of nonmagnet-izable material, to which in turn said conductors may be secured in any con- ,the drawing. By the employment of the venient manner. In this way, the-magnetic lines of force passing from the projections b of one pole a, to those of the-other pole will alternately flow through the armature c and segments a, as clearly illustrated in magnetic flux conductors d, the variation of the flux in the armature-web is accelerated, while at the same time, the path of the lines of force is-practically closed at all times. Erom Figs. 1 to Sit is apparent that during each revolution of the armature, the lines of force pass the armature-web twice in the same direction, and twice in the opposite Y direction,

tobe generated;

rent maxima, either one or both poles-of 'onepole of armature a" has a "pair of polar pair of similar projections i,'/t'. The mag net shanlca is provided with a pair of v polarpnojectidns p, 9, while shank a has pola projections g, l; of'arinatiire c are 'u', tli magnetic lines of forcewi ll pass from shun; a through the polar pro ections {7, g,

to shank a". During the continued rotation of armature c, the projections q, u are-o posed by rece ses 0, so that no lines of fu -ie will pass i'oiigh the armaturewcli; [11 order to prei-eiit an uninterrupted flow of the magnetic lines of force, shanks a, a are provided with auxiliary polar proconduetoifs Z will, temporarily connect shanks a, a' by bridging projections p, s and t, 1*. The polar projections p, q and t, u will next be opposed by the projections g, It and It, 5 respectively, so that the magnetic lines of force will again flow through the armatureweb. During the continued rotation of the armature, said lines of force will disappear in its web, and How instead from projection 71 to projection 8 through armature projection g, and from projection 1- to projection t through projection is. Finally the polar pifjections p, t are opposed by the projections/t, so that the lines of force will agaiii pass the armature-web, the operation above described comprising one half of a. complete rotation. During this period, thelines of" force have passed the armature-weir three times in the same dicomplete rotation, the lines of force'will pass the web three times in the oppos te direction, so that six current maxima will armature.

In Fig. 10, the armature c is identical with the armature shown in Fig. 9, while the magnet shanks a' and a"" are provided with polar projections '11, w and w, 3

respectively, which are so arranged that Patent-ed July 8,1913. Application filed November as, 191 Serial' 1m 133,070.

er-mature 0 may be provided with peripherali'ecesses e, F ig. 9 showing both poles I provided with such recesses.- In-this way,

projections g, it, while its other pole has a- -rcsp:'-rtivc ly located opposite projections q,

jections 1', s respectively, so that the fluxv be generated during each revolution of the thus causing fourcurrent maxiina In order to increase the number of cur-' the corresponding pro ections t,'1z.- If the the vb of armature c and projections Is, it

foe

rection, while during the other half of said during (-zirh hall rotation, the magnetic llux first mssrs to we in sucression through one pair of diametrically opposed projections of the armature poles and the armature web, and then passes twice through the other pair of such poles and through the web. In other words, the magnetic lines of force will rollseculirelv flow during each half rotation through firstly the parts '0, g, c, 70, x; secondly the parts '0, g, y, and w,

and '1 i, :0; sixthly the parts w, i, c, k, y, and serentlily the parts 0, d, 3 and 'w, 03, :20. As the magnetic flux in the second, fifth and seventh instances does not pass armatureveb c, it is obvimis that only the four remaining instances will generate as many current maxima, so that eight of such maxinia will be obtained during each complete revolution of the armature.

I claim:

1. A dynamo electric machine com rising a bipolar field magnet, each shank 0 which is provided with a plurality of polar projections of like sign, a bipolar armature rotatable opposite said projections, and maga: thirdly the parts in, is, c, g, y; fourthly the parts 1:, l1, 1;, z, m; fifthly the parts '1), k, y

netic fluxconductors carried by the armature and arranged intern'iediate the armaf ture poles, said flux conductors being mag netically insulated from the armature.

2. A dynamo electric machine comprising a bipolar field magnet at least one shank of which is provided with a plurality of polar projections of like sign, a double T armawss 3. A dynamo electric machine comprising 40 a bipolar field magnet each shank of which is provided with a plurality ofpolarproje'ctions of like sign, an armature havingrecessed pole pieces that are ,adapted to be moved past said projections, and magnetic flux conductors carried by the armature and magnetically insulated therefrom, said flux conductors being also adapted to be moved past the polar projections. v

EUGEN HELD.

Witnesses I FRIDA KLAIBEB, I ERNEST ENTENMANN.

Copies of this patent may be obtained for live cents each, by addressing the Commissioner oil-Parents V Washington, D. O. 

